High Vacuum & high Temperature

Leider ist der Eintrag nur auf Amerikanisches Englisch verfügbar. Der Inhalt wird unten in einer verfügbaren Sprache angezeigt. Klicken Sie auf den Link, um die aktuelle Sprache zu ändern.

This test device was developed to determine friction factors under vacuum/high vacuum and high temperature conditions up to 700°C for lifetime tests and benchmarking of different materials. The sample temperature is measured on-line, the torque measurement is done punctual (individual interval 10 <> 120 s) using following method: the rotation is done CW and CCW for a defined number of rotations, then a difference measurement is done. This is necessary for piezo sensors which are not usable for on-line measurement due drifting of the signal. Post-Analysis may cover measurement of wear by topographic means. Investigation of surface morphology or material transfer is possible using SEM/EDX. Changes in the subsurface microstructure can be analysed locally resolved by EBSD (Electron Back Scattering Diffraction). The device is fully PC-controlled. On-line-data acquisition offers to post-process data, e.g. for automatic calculation of friction coefficients in running-in or steady state, as well as benchmark of different materials under high vacuum and high temperature conditions.

Measurement of

Friction force / coefficient (punctual, individual interval
10 <> 120 s)

  • Temperature (on-line)
  • Wear (geometric or mass loss)

hvt_1Geometry: cone-disk-on-ring

htv_2Geometry: pin-on-disk

hvt_3Mounted setup with inductive heating

hvt_4Full test setup

Specifications
Test Measurement of

  • Friction force / coefficient (punctual, defined interval 10 <> 120 s)
  • Temperature (on-line)
  • Wear (geometric or mass loss)
Temperature from RT up to + 700 °C
Load (contact pressure) 3 to 30 N (50kPa <> 300kPa for Cone-ring-on-disk, higher hertzian pressure up to MPa range possible depending on radius of pin-on-disk)
Speed / Motion 0.001 <> 0.2 m/s (1 <> 150 rpm)
Environments Vacuum to high vacuum (10^3 <> 10^5 mbar depending on outgassing behaviour of sample)
Samples Cone-ring-on-disk, pin-on-disk
Accuracy Torque 10 Nm max (piezo) Sample temperature ±
10 °C Load ± 0.1 N